2010 U.S. Open top men's contenders

No. 1 RAFAEL NADALAge: 24Best U.S. Open finish: Semifinals (2008, 2009)Quick point: Nadal enters the U.S. Open playing the best tennis of his career after winning the French Open and Wimbledon and unseating rival Roger Federer as the No. 1-ranked player in tennis. (Credit: AP)